There's not enough information for a fair opinion on the matter.
The professor felt devalued from class behaviour, so he "made himself scarce". After establishing credibility by telling us about his past experiences and successes, he quits for reasons we can all empathize with. Scarsity, social proof and authority are 3 of the six principles described by Cialdini's Influence.
The professor felt devalued from class behaviour, so he "made himself scarce". After establishing credibility by telling us about his past experiences and successes, he quits for reasons we can all empathize with. Scarsity, social proof and authority are 3 of the six principles described by Cialdini's Influence.